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Showing 1 to 20 of 333 for “"Aromatic hydrocarbons"”.
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Gas-phase Ion Chemistry of Hydroxy and Amino-substituted Interstellar Polycyclic Aromatic Hydrocarbons and Protonated Polycyclic Aromatic Hydrocarbons
… of hydroxyl- and amino-substituted polycyclic aromatic hydrocarbons (PAHs) and their protonated counterparts were studied using mass spectrometry. Ions were generated using an electron ionization (EI) source and the unimolecular chemistry of metastable ions was studied by performing …
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Dermal exposure to polycyclic aromatic hydrocarbons among workers
Contains fulltext : mmubn000001_180842978.pdf (Publisher’s version ) (Open Access)
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Lichens as biomonitors for atmospheric polycyclic aromatic hydrocarbons
… in Africa, studies investigating the polycyclic aromatic hydrocarbons (PAHs) levels in lichens (species Parmotrema austrosinense (Zalhbr.) Hale) was performed successfully using various sample preparation techniques. Sampling campaigns were conducted at 5 different sites across South Africa. …
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Studies of Polycyclic Aromatic Hydrocarbons in Urban Atmospheres
Polycyclic aromatic hydrocarbons (PAH) are known to exist in urban atmospheres and are suspected of carcinogenic potential. The implementation of emission control regulations and changes in fuel usage over the last twenty-five years has affected air quality in general and PAH concentrations in …
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Copolymers From Some Aromatic Hydrocarbons and Vinyl Monomers
Made available in DSpace on 2014-12-05T19:36:52Z (GMT). No. of bitstreams: 1 5801750.pdf: 4141915 bytes, checksum: 3778e59afb0b1e1dfa3859ded94de4e3 (MD5) Previous issue date: 1958
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QUINODIMETHANES - AN EFFECTIVE STABILIZATION STRATEGY FOR POLYCYCLIC AROMATIC HYDROCARBONS
… of a quinodimethane (QDM) core with a polycyclic aromatic hydrocarbon (PAH) framework led to the birth of a new class of quinoidal polycyclic/heterocyclic hydrocarbons (PHs) with numerous potential applications in materials chemistry. Over the years, intensive research efforts involving …
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Microbial degradation of high molecular weight polycyclic aromatic hydrocarbons
The bacterial degradation of high molecular weight PAHs was investigated by isolating communities and individual strains from a PAH-contaminated site. Microbiological analysis of soils from Port Melbourne, Australia, resulted in the enrichment of five microbial communities capable of degrading …
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Photochemistry of Polycyclic Aromatic Hydrocarbons with Environmentally Relevant Metals
… atmosphere and water systems between persistent aromatic compounds and varying species of metals with an emphasis on iron. Bulk water suspensions of a standard soil and polycyclic aromatic hydrocarbons (PAH) were analyzed for soluble iron by inductively-coupled plasma mass spectroscopy (ICP-MS) …
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Biotransformation of aromatic hydrocarbons and organic sulphides by fungi
… the substrates, that the hydroxylation of hydrocarbons at the benzylic position proceeds via a one electron abstraction from the aromatic ring, giving a radical cation. A series of 1,3-oxathiolanes (eight) were incubated with Mortierella isabellina , Helminthosporium , Rhizopus arrhizus , …
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Flash-Photolytic Studies of Delayed Fluorescence From Aromatic Hydrocarbons
Made available in DSpace on 2014-12-13T20:10:15Z (GMT). No. of bitstreams: 1 7804071.pdf: 6991956 bytes, checksum: 79a1b0f7707bc8c709f2b3ca45858761 (MD5) Previous issue date: 1977
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The Origin of Polycyclic Aromatic Hydrocarbons in Diesel Exhaust Emissions
… the origin of a group of compounds, polycyclic aromatic hydrocarbons (PAH), in diesel exhaust emissions using 14C-radiotracer techniques developed specifically to investigate the origin of the organic components in diesel emissions. The use of radiotracers in this research has enabled both the …
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Permanganate oxidations of aromatic hydrocarbons in aqueous and organic solution
The oxidations of a select group of arylalkanes by permanganate have been studied in aqueous solution and in toluene. In water at pH 7, the reactions of toluene, ethylbenzene, and cumene with KMnO$\sb4$ were studied. In toluene, $\rm\sp{n}Bu\sb4NMnO\sb4$ was used as the oxidant in the reactions of …
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Polycyclic Aromatic Hydrocarbons and the Microbiomes of Two Benthic Species
… Sound and the concentration of polycyclic aromatic hydrocarbons (PAHs) within the oyster tissue, shell and nearby sediment were measured. Analysis of the flounder microbiome showed significant responses to both the oil and pathogen exposure, but those responses differ between gill and …
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The oxidation chemistry of the xylenes and related aromatic hydrocarbons
… a wide range of mixture composition. The major aromatic products from the oxidation of the xylenes were the isomeric tolualdehydes, toluene and a-xylylcne oxide (from a-xylene). These were found to be similar to the products formed from the oxidation of toluene at 753K. From examination of the …
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The Photodecomposition of Polynuclear Aromatic Hydrocarbons in Natural Water Systems
Made available in DSpace on 2014-12-10T22:22:12Z (GMT). No. of bitstreams: 1 7500369.pdf: 4717469 bytes, checksum: 84e976154b5e37f7d47fe09e72006861 (MD5) Previous issue date: 1974
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Physico-chemical speciation and ocean fluxes of Polycyclic Aromatic Hydrocarbons
Thesis (Ph. D.)--Joint Program in Oceanography, Massachusetts Institute of Technology/Woods Hole Oceanographic Institution, 1997.
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Atmospheric partitioning of polycyclic aromatic hydrocarbons (PAH) and oxygenated PAH
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1997.
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